After the The Waters of Life quest, an Enclave camp will appear on the highway overpass just west of the entrance. The camp is populated by an Enclave officer and two Enclave soldiers, one of whom is equipped with Tesla armor and a missile launcher. Curiously, the soldier with the missile launcher is friendly until you approach the camp and alert the two hostile soldiers. If you manage to stealth kill the two hostiles, the friendly soldier will remain friendly.